CVE-2022-36436

Public Exploit

Description

OSU Open Source Lab VNCAuthProxy through 1.1.1 is affected by an vncap/vnc/protocol.py VNCServerAuthenticator authentication-bypass vulnerability that could allow a malicious actor to gain unauthorized access to a VNC session or to disconnect a legitimate user from a VNC session. A remote attacker with network access to the proxy server could leverage this vulnerability to connect to VNC servers protected by the proxy server without providing any authentication credentials. Exploitation of this issue requires that the proxy server is currently accepting connections for the target VNC server.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.13%
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/osuosl/twisted_vncauthproxy/tree/release/1.1.1 release notes
https://pypi.org/project/VNCAuthProxy/ product
https://github.com/osuosl/twisted_vncauthproxy/commit/edc149af29242178091b2d6fcd42c3ef0851644b patch
https://cert.grnet.gr/en/blog/cve-2022-36436-twisted-vnc-authentication-proxy-authentication-bypass/ patch exploit

Frequently Asked Questions

What is the severity of CVE-2022-36436?
CVE-2022-36436 has been scored as a critical severity vulnerability.
How to fix CVE-2022-36436?
To fix CVE-2022-36436, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-36436 being actively exploited in the wild?
It is possible that CVE-2022-36436 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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